JR Radio Question

[AWorrest at aol.com]

Just an afterthought, ground range comparisons between different locations 
aren't very meaningful.  My field location is fairly clean of electromagnetic 
interference. Other places are not so lucky.  The time to do a ground range 
check    is when everything is working.  Then use it as reference for that 
location.

Allan

In a message dated 6/5/2004 1:35:12 PM Central Daylight Time, 
AWorrest at aol.com writes:

> Craig,
> 
> It sounds to me that you have a transmitter problem.  With the JR 8103 
> transmitter I typically have over 400 feet ground range. This is measured on an 
> asphalt runway.  The transmitter antenna is collapsed and pointed at the model. 
>  The receiver antenna is 90 degrees to the transmitter antenna.  This ground 
> range applies whether I'm using JR, Airtronics, or Hi-tech FM receivers.  
> Check to see if the transmitter antenna is firmly screwed into the base 
> connector.  I have often run my transmitter with the antenna fully collapsed (but 
> not removed) for several minutes at a time with no ill effects.  Just to be 
> certain feel the module.  It may get warm, but should not be hot.
> 
> Allan Worrest
> 
> In a message dated 6/4/2004 11:51:33 PM Central Daylight Time, 
> CELeon at aol.com writes:
> 
> >> When doing a range test with a JR 8103 FM transmitter and a JR 549X 
>> receiver, without the engine running, standing 90 degrees to the receiver 
>> antenna, I'm getting jitters in the control surfaces at about 40 or 50 feet, with 
>> the transmitter antenna fully collapsed.  Changing the position or location 
>> of the receiver antenna does not seem to make any difference unless I pull it 
>> out of the plane and forward of the cockpit and engine.  This is an all 
>> balsa Viper.  Same results with two different receivers.  Flew it once and it 
>> glitched in the air 3 times.  Roughly the same location each time.  About 30 
>> degrees to the right of where I was standing.  Some local club members think 
>> that leaving a JR transmitter on with the antenna fully collapsed for more 
>> than a few minutes will damage the module, and might be causing the problem. 
>>  Any suggestions will be appreciated.  Time to send it to Tony?
>> Thanks,
>> Craig Leonard
>> NSRCA 2405
>> 
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20040605/05548874/attachment.html